Fire baffle



April 14, 1931o R. J. ANscHlcKs 1,800,977

FIRE BAFFLE Filed Sept. 5, 1929 Patented Apr. 14, 1931 N UNITED STATESyPATENT OFFICE i RUDOLPH J'. ANSCHICKS, OF CHICAGO, ILLINOIS, .ASSIGNOR`TO YIROTECTOSEAL COM- PANY 0F AMERICA, 0F CHICAGOfILLIN 01S, ACORPORATION 0F ILLINOIS FIRE nAFELn i Application nica september 5,1929. seria; No. 390,556.

My invention `relates to lire baffles and more particularly to firebattles of the general type of construction shown in my copendingapplications, Serial No. 354,329, filed April 21, 1929, and Serial No.388,159, filed August 24, 1929, wherein are shown a plurality ofrelatively closely spaced annular plates which permit the passage offluid therethrough and quench the flames in the event such fluid isburning.

An object generally of the invention is the improvement of fire bailleconstruction of the kind described. i

An ob] ect of my invention is to provide an improved device forpreventing the passage mounted in the air inlet of acurburetor so as Yto ,permit unrestricted flow of air finto the carburetor and to preventthe escape of backiiring flames throu,,3"h'the` air inlet.

The inventioncontemplates the provision of a casing of substantialthicknesathe walls of which are so apertured as to permit the passage offluid therethrough, the aperture or apertures being relatively very'`thin as comparedwith the thickness of the wall of' the casing, wherebyburning gases are permitted topass through the wall but in so doing, arecooled and theliames extinguished.

My invention contemplates constructing the side wall of the casing ofaplate orplates y having ilat cross sections arranged to form a helix,the pitch of the helix being slightly` greater than the thickness of theplate so that a helicalaperture or apertures are formed in the wallofthe device through which the gases are permitted to escape.

A further object is theprovisionof a de-s parts Vdome 10 or the like.

vice which is simple, compact, durable, relia`V ble, efficient andsatisfactory for its intended purpose.

Many other objects and advantages ofthe `f construction herein shown anddescribed will be obvious to those skilled in the art `from thedisclosure herein given.

To this end, my invention consists in the novel construction,4arrangement, and combination of parts herein shown and described, andmore particularly `pointed out in the claims.

In the drawings, forming apart ofy this specification, and wherein likereference characters indicate like or corresponding Fig. lisaxtransvlerse sectional view of a portion of a tank or similarreceptacle to which a device embodyingmy invention is applied; Y

Figa -2 isa section along the line 2-2 of v Fig. l and 3 is asectionalview shcwing a car-` buretor intakehavingthe device of my` in-` ventionmounted there0n.`

Referring nowmore Aparticularly to the drawings, the invention is shownin Figgl `in connection with a vent openingQ in a tank A threadedannular flange 11 forms a border for the opening 9. Acylindrical memberA12 having its upper end open and its lower end closed has threaded`engagement with the flange l11 thereby closing the opening 9. l

rlhe upper end of the cylindrical member 'I I.

1-2 is bounded by an outwardly turned iiange 13 upon which a helicalplate 14 is positioned to form an extension yof ber. A cover plate 15closes the outer end of the cylindrical space enclosedby the helix 14and is fastenedto the flange 13 by a plu-` ralityof screw bolts 16. Thecross section ofthe late 14C `is of uniform thickness, the pitcho'f) theplate being slightly greater than its thickness, thereby providing arelatively thin helical aperturel. The thickness'of the helical aperture17 maybefadjustedby means of the screws 16, but the thickness of theaperture is relatively slight as compared with the thickness of theplate ltA The the cylindrical mem- Y oflclips 22. Thel space betweentheconical height to whichthe plate 14 extends and the number andthickness of the apertures is preferably made such that the total inletarea of the aperture is substantially equal to the cross sectional areaof the cylindrical. Vspace enclosed by the helicalplate 14, i

The cylindrical member 12 has oppositelypositioned openings 26 in itsside walls which are normally closed by doors 25 and 26. The

doors 25 and 26 are pivotally suspended from supports27 and are slightlyinclined to the vertical. The door 24 opens inwardly in order to providean outlet for vapors when the pressure within the tank exceeds apredeterminedmaximum. The door 25 is swung open outwardly Aand remainsclosed until there isa predetermined low pressure within the tank. Thepressure olf' 'the atmosphere uponthe interior of the door 25 will thencause the door 25 to swing open and to relieve the low pressurecondition within the tanln,v`

This form of vent control device is more fully described and explainedin my copen'ding application, Serial VNo. 388,159, filed Aug. 24,1929.While this device is shown with the fire baflleon theexterior of thetank and the closed cylindrical memberv 12 onthe' interior of the tank;theser'positions could, it desired, be reversed.

The projecting exterior portion of the device comprising the fire bailleis surrounded with a cylindrical housing 18vv having an annular plate 19clamped between the Vflanges is bounded by a downwardly sloping fla-nge20., A conical member`21 forms a coyer for the housing 18 and isfastened thereto and spaced apart from the housing by a plurality member21 andthe liange 20, is suliicient-to permit unretardedfflow ofairandgases, It will'be obviousthat this constructionof a. fire bailleisrelatively simple and iscapable ofhaving the thickness ofthe-'helicalaperture adjusted by merely threading the screw bolt'ltV inwardly or;outwardly as desired.

Another embodiment of thecinventionV is shown Fig as mountedV in andforming a lire baille for Vcarburetor air inlet pipe 31;'

Apipe section 321is provided liormoun'tingV inthe' Open end ofthe ,inletPipe/31 fermire.V a .close fit therewith and in order1 that the` pipe-32may be easily'pos'itioned or removedV it is provided with' apluralityot'` slots 34,

The outer end of the pipe32has flange .33V between which and a coverplate 36 is posi tiene/deheleel plete 35, forming-e re beide, The plate36 is connected tothe flange 33fby` a plurality of bolts 37. VThehelical plate. t35v is thereby clamped in position, the bolts 3 7 alsoprovidingrmeans foradjusting a heli.v

cal aperture 38 between the various windings er mappings ef the plete-fVif Y Incase o-.back fire from the carburetor, the explosivegases :willbe able to -escapethrough terme,

Athe helical aperture 38, and at the same time,

by reason of the aperture being thin and the width of the platesrelatively great, the flame will be extinguished. This embodiment of thedevice, in addition to providing a fireextinguishenjpermits the4 forceofthe-explosion of Vgases to be dissipatedtherethrough, and also serves asa mulller for deadeningv the noise of the explosion.

- Having thus describedlmy invention, it ',is

1.. Fluid control means-for aivent'opening 85 deed Slimmer usesmentioned.-

of a casing ofthe kind described, said means` comprising a helicalplate,l a cylindrical memf ber mounted onone end otthe helical plateYand l.means closing the opposite end of eai plate. t i i Y 2.Y Fluidcontrol means for a vent opening of e easing ofthe knddeserbed, `Seidmeene comprising a helical plate, a cylindrical mem-A f Y ber mounted onone end of the helical late, and means closingthe opposite end o saidplate, the space between adjacent windings of4 the plate being thinYrelative to its width.

` 3. VFlnid controljmeans for avent opening ef ef easing ef the kinddeserbedeed Iieeeil-v comprising a helical plate, a cylindrical mem. Y

ber-v mounted on one end of the helical plate,

means closing .the ,Oppositie eed` ef Seid plete,

and fastening means operableto fasten member:V A

closing means ,to said' cylindrical n 4. 'In a device ef the. knd-deseribed e helif cal plate, means for closing an endof the space .Yenelesed bysed'pleteend Ineens vier fasteding the devee te the ventopening 0f e tank er the like wi. h the epenend ef Seid helical, PletefY. in v,1-.eefi-'-1trywith SaidOpening'. y

5. AInaA device of the kind d scribed, e helieel plete, meel-,1S I-er1eleengfen endfefthe- Speee. enclosed by Seid plete,andmeeneferfeSteningY-the-devee tothe vent epeenget e.

cal plate Ainlegistry with said opening, the

Space between edi eeleut windings vet the plete i being thin relative tothelwidth of the plate. t

21,6., Fluid eentrel meeneferefvent- @Peeing offa tank ofthe kinddescribed, ,comprisingahelical plate having one endenclosing the rrhereledge ezf the ripening, e plete deems the outerfend'of the cylindricalspace formed by the helical plate, the jspaeg vbetween, adje-f centwindings kof said helical plate bein'gthin relative te the Width of the'plete- 1 7.F1ud eentrel'fmeens fer e-fvent enenig of a casing ef thekinddeseribed, Seid meals comprising a helical plate, aoylindrical mem-*ber meuintesl en one end .of ,the helienl plete,

means closing the opposite end of said plate,

and fastening means operable to compress the helical plate between saidclosing means and cylindrical member.

8. Fluid control means for a vent opening of a casing, said meanscomprising a helical plate, a cylindrical member mounted on one end ofthe helical plate, means closing the opposite end of said plate, andfastening means operable to compress the helical plate between saidclosing means and cylindrical member, said fastening means beingadjustable to permit the thickness of the spacing between the windingsof the helical plate to be varied.

9. In a device of the kind described, a helical plate, a cover for oneend of the cylindrical space enclosed by the plate, an annular membermounted on the opposite end of the plate, and a plurality of boltsadjustably connecting said cover and annular member with the helicalplate positioned therebetween.

10. In combination with an inlet pipe for a carburetor, a plate forminga helix and encompassing the sides of a space communi-V cating with saidpipe, means for closing an end of said space, said plate having arelatively thin space between its windings.

In witness whereof, I hereunto subscribe my name this 21st day ofAugust, A. D.,

RUDOLPH J. ANSCHICKS.

